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BQ27541-V200: GPC_report by GPCCHEM

Guru 29380 points
Part Number: BQ27541-V200
Other Parts Discussed in Thread: GPCCHEM

Hi Team,

My customer got GPC_report by GPCCHEM.
https://www.ti.com/tool/GPCCHEM
May I ask the following?

1)
The report shows deviation is 1.17%. Is it reasonable value?
>Best chemical ID : 2483 Best chemical ID max. deviation, % : 1.17

1057.GPC_report.txt
Chemistry ID selection tool, rev=2.52		
		
Configuration used in present fit:		
ProcessingType = 2		
NumCellSeries = 1		
ElapsedTimeColumn=0		
VoltageColumn = 1		
CurrentColumn = 2		
TemperatureColumn = 3		
		
Best chemical ID : 2483	Best chemical ID max. deviation, % : 1.17	
		
		
		
Summary of all IDs with max. DOD deviation below 3%		
		
Chem ID	max DOD error, %	Max R deviation, ratio
2483	1.17	0.31
1220	1.24	1.76
1104	1.24	0.96
2727	1.26	1.04
1286	1.26	0.43
1312	1.26	1.5
1189	1.27	1.68
1329	1.35	1.32
3519	1.4	0.74
1326	1.4	0.74
1313	1.45	1.81
1142	1.45	1.31
1232	1.48	1.61
353	1.49	0.45
1143	1.49	1.54
1213	1.51	0.95
1277	1.54	0.33
2249	1.54	0.2
397	1.55	0.5
1148	1.56	1.87
1100	1.56	0.54
1167	1.57	2.18
1166	1.58	1.93
1176	1.58	2.59
178	1.59	0.94
1597	1.6	0.45
1315	1.62	0.5
187	1.62	0.39
1188	1.62	2.49
1118	1.63	0.95
1347	1.64	1.31
1136	1.64	2.27
1121	1.66	0.86
1179	1.67	1.09
129	1.67	0.3
1131	1.67	1.56
1296	1.67	1.22
3147	1.67	1.23
1559	1.68	4.76
1310	1.68	0.66
1255	1.68	1.77
1228	1.68	0.77
1129	1.71	1.83
1210	1.72	1.21
1139	1.72	0.9
1923	1.72	0.51
1297	1.72	2.11
1337	1.74	0.61
183	1.76	0.76
2070	1.77	0.36
1140	1.77	1.33
1130	1.78	1.09
1302	1.79	0.31
3157	1.8	1.65
1751	1.82	0.37
1186	1.82	1.39
391	1.83	0.84
2596	1.83	0.82
1316	1.84	1.02
1319	1.84	1.01
123	1.84	0.92
1381	1.85	0.5
2304	1.85	0.39
1194	1.85	1.69
145	1.86	0.81
1239	1.86	0.3
180	1.86	0.26
384	1.86	1.49
1193	1.86	1.36
1108	1.88	0.68
2224	1.88	0.33
1311	1.88	0.5
5691	1.9	0.33
2013	1.9	1.61
3161	1.91	1.39
1269	1.91	0.74
199	1.91	0.61
1285	1.91	1.77
2063	1.91	5.35
2992	1.93	1.33
109	1.93	0.37
160	1.93	0.88
388	1.93	0.89
1234	1.93	1.25
1117	1.93	1.84
1763	1.98	0.31
351	1.98	1.09
166	1.98	0.79
107	1.98	0.33
179	1.99	1.28
130	1.99	0.9
1141	2	0.72
131	2	0.43
194	2	0.91
533	2.03	1.05
162	2.04	0.82
1178	2.06	0.95
2290	2.07	0.92
330	2.07	0.49
1202	2.08	0.67
1151	2.09	1.69
1333	2.1	1.95
135	2.1	0.23
169	2.1	0.47
1537	2.1	1.01
1307	2.11	0.7
144	2.11	0.36
165	2.12	0.85
1119	2.12	1.37
5211	2.13	0.5
1208	2.14	0.81
1375	2.14	0.62
3111	2.14	1.14
181	2.14	1.22
1260	2.15	0.89
1322	2.17	0.85
1617	2.17	0.84
1177	2.17	0.58
317	2.18	1.35
1257	2.19	0.87
1172	2.2	0.62
1111	2.22	1.29
177	2.22	1.53
1360	2.23	0.42
3169	2.23	0.91
387	2.24	1.45
390	2.24	1.45
1229	2.24	1.81
327	2.25	0.82
1266	2.25	1.06
1317	2.26	0.43
1564	2.26	0.46
2195	2.26	0.62
1110	2.26	0.78
1342	2.27	0.78
1288	2.27	0.92
1162	2.27	1.03
1132	2.27	0.9
358	2.29	2.06
2105	2.3	2.1
1341	2.3	0.88
3139	2.3	1.1
134	2.31	0.31
1115	2.31	0.91
1112	2.31	0.8
1374	2.31	0.5
1370	2.33	0.7
1858	2.35	0.62
3323	2.35	0.71
1184	2.35	0.59
2313	2.35	0.78
3731	2.35	1.35
5220	2.36	0.36
3771	2.36	1.38
133	2.37	0.54
1218	2.37	1.48
325	2.38	0.83
1224	2.38	0.79
1114	2.38	1.23
3610	2.39	1.16
1223	2.4	0.74
329	2.41	0.7
1535	2.41	1.28
1303	2.42	1.03
2453	2.42	0.83
2536	2.43	0.32
1195	2.43	2.51
2489	2.44	0.35
2621	2.44	0.73
394	2.45	1.39
3238	2.48	1.22
1348	2.49	0.94
1211	2.49	1.12
1336	2.49	0.66
1283	2.5	2.64
1147	2.51	1.09
366	2.52	0.86
1203	2.53	1.13
1335	2.53	0.56
2454	2.55	1.03
2452	2.55	0.82
1107	2.55	2.21
376	2.56	1.55
2455	2.57	0.78
1289	2.59	2.6
120	2.59	0.8
3108	2.59	1.61
1164	2.61	0.6
1256	2.62	0.52
1272	2.62	0.64
3145	2.63	1.24
2340	2.63	0.65
341	2.63	0.69
1154	2.64	1.69
154	2.66	0.76
1422	2.67	0.6
396	2.67	0.5
1814	2.67	1.06
1344	2.68	0.52
1345	2.7	0.52
352	2.7	1.22
380	2.71	1.12
189	2.72	1.13
3684	2.73	1.71
3144	2.74	0.73
1225	2.77	0.85
1380	2.78	0.31
136	2.78	0.79
3123	2.81	1.15
196	2.82	1.45
157	2.82	0.59
1215	2.82	1.07
1906	2.85	0.78
1103	2.85	0.82
316	2.86	1.64
1185	2.86	0.32
395	2.86	1.93
363	2.87	1.18
2384	2.87	0.68
1183	2.89	2.16
3106	2.9	1.58
3107	2.91	0.92
1198	2.91	0.97
128	2.92	0.48
2312	2.93	0.74
1238	2.94	0.91
111	2.94	0.4
1261	2.94	1.43
158	2.94	0.92
1250	2.94	0.6
372	2.95	1.36
172	2.96	0.8
365	2.96	1.07
2147	2.96	0.82
150	2.98	0.98
3226	2.98	1.01
2022	2.98	0.52
168	2.99	0.54
		
Max. deviations for best ID is within recommended range. Chosen best chemical ID is suitable for programming the gauge.		
		
		
Selection of best generic ID for ROM based devices like bq274xx		
		
		
Device / Family #1		
Generic Chem ID	Device/ Voltage/ Chemistry	max DOD error, %
354	bq27411-G1C: 4.35V LiCoO2	1.88
128	bq27421-G1A: 4.2V LiCoO2	2.92
3142	bq27421-G1D: 4.4V LiCoO2	3.09
312	bq27421-G1B: 4.3V LiCoO2	6.61
Best generic ID 354		
Max. deviations for best generic ID is within recommended range. Please chose this ID in your device configuration or device family.		
		
		
Device / Family #2		
Generic Chem ID	Device/ Voltage/ Chemistry	max DOD error, %
1210	bq27621:  (ALT_CHEM1) 4.3V LiCoO2	1.72
354	bq27621:  (ALT_CHEM2) 4.35V LiCoO2	1.88
1202	bq27621: (default) 4.2V LiCoO2	2.08
Best generic ID 1210		
Max. deviations for best generic ID is within recommended range. Please chose this ID in your device configuration or device family.		
		
		
Device / Family #3		
Generic Chem ID	Device/ Voltage/ Chemistry	max DOD error, %
3230	bq27426: (default) 4.35V LiCoO2	1.63
1202	bq27426: (ALT_CHEM1) 4.2V LiCoO2	2.08
3142	bq27426: (ALT-CHEM2) 4.4V LiCoO2	3.09
Best generic ID 3230		
Max. deviations for best generic ID is within recommended range. Please chose this ID in your device configuration or device family.		
		
		
Warning: voltage in V detected	 divider changed to 1	



2)
He got the data with 4040mAh battery however it seems recommended chemical ID : 2483 is 3000mAh. 
Is this all right?
I would like to ask it just in case.

Best Regards,
Yaita

  • Hello Yaita,

    Under 3% max DOD error is what we aim to get with the GPCCEM tool, this is a good match.

    The capacity listed on the chem ID does not matter for gauging. We care about the OCV vs DOD curve, which is not dependent on capacity.

    Sincerely,

    Wyatt Keller